(57) The invention relates to a high speed hand tool provided with a saw disc (1,14) which
has less than ten teeth (2), preferably four, each tooth (2) having a radial flank
(8), which preferably inclines forward in the cutting direction, and a tangential
flank, which has a small clearance angle (b). The teeth may have a greater thickness
than the disc itself which thickness, in that case, diminishes in a direction opposite
to the direction of rotation. In another embodiment the teeth are offset alternately
to the right and the left. The invention also comprises an adjustable protective device,
which enables to set the depth of a perpendicular saw cut.
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